kubatyszko wrote:I just noticed that you seem to be missing the 5V aux line - all of the "aux" should be showing up in standby. What is VERY strange, is that you have all of the 3.3V aux ones, and 5V aux PIMM.

ATX only provides one 5V rail in standby, so if you see 5V in one place but not the other that's odd, and even better, since the 3v3 aux ones are actually converted from 5V - this proves that the 5VSB gets to your fuel just fine.

From this information I can deduce that either one of your DS1780 (monitoring chips) is fried or something on the board makes the monitoring not work - could be short of the 5V just before the monitoring input.

I'd like to figure out how NODE0 ... NODE2 map to the three DS1780 chips on the mainboard. I've got a cranky Fuel myself, and I'd rather not swap thta DS1780 between the PCI slots unless there was no other option.

To accentuate the special identity of the IRIS 4D/70, Silicon Graphics' designers selected a new color palette. The machine's coating blends dark grey, raspberry and beige colors into a pleasing harmony. (IRIS 4D/70 Superworkstation Technical Report)

jan-jaap wrote:I'd like to figure out how NODE0 ... NODE2 map to the three DS1780 chips on the mainboard. I've got a cranky Fuel myself, and I'd rather not swap thta DS1780 between the PCI slots unless there was no other option.

Is yours complaining about a specific node # ? Because the hard way would be just to replace 1 by 1 the other two, plug the boardinto power and run the L1 to see if it keeps complaining....

If you can do your own soldering then that would take some time but it would not be wasted....

mmmm before removing the chips , what about checking the current on the pins that should have Vdd etc ? ( the chip schematics are online ) ( this is for the OP )This to triplecheck that the issue is a chip, and not something prior elsewhere.

And... one chip should be on the backside of the mb.. are we sure that there's nothing that maybe moved there and is causing a short ?Dunno... a dead spider ?

mazzinia wrote:mmmm before removing the chips , what about checking the current on the pins that should have Vdd etc ? ( the chip schematics are online ) ( this is for the OP )This to triplecheck that the issue is a chip, and not something prior elsewhere.

And... one chip should be on the backside of the mb.. are we sure that there's nothing that maybe moved there and is causing a short ?Dunno... a dead spider ?

I can inspect it when I remove the motherboard eventually. But given the well documented demise of these chips all overthe place it seems likely that one of them called it quits.

If I had to *guess*, my bet would go on the DS1780 near the ATX socket or below it.

There are 4 of those chips in total:

Between PCI slots

Below the ATX socket (can't remember the precise location)

Somewhere near the Yellow ST chip

On the PIMM module.

I don't have reliable information on which chip monitors which voltages or fans.

Thing is that all those are simply MONITORING issues, disabling env monitoring (env off) should let you go further and boot the machine. If that doesn't happen then you do have bigger problem with either the PSU or some voltage regulation onboard.

kubatyszko wrote:Thing is that all those are simply MONITORING issues, disabling env monitoring (env off) should let you go further and boot the machine. If that doesn't happen then you do have bigger problem with either the PSU or some voltage regulation onboard.

The DS1780 chips communicate with the L1 using I2C. I don't know what else is on the I2C bus (ID PROM chips?), but I2C problems can stop the system from booting.

To accentuate the special identity of the IRIS 4D/70, Silicon Graphics' designers selected a new color palette. The machine's coating blends dark grey, raspberry and beige colors into a pleasing harmony. (IRIS 4D/70 Superworkstation Technical Report)

kubatyszko wrote:Thing is that all those are simply MONITORING issues, disabling env monitoring (env off) should let you go further and boot the machine. If that doesn't happen then you do have bigger problem with either the PSU or some voltage regulation onboard.

The DS1780 chips communicate with the L1 using I2C. I don't know what else is on the I2C bus (ID PROM chips?), but I2C problems can stop the system from booting.

Forgot about the vpro (my experimental fuel has no video card ).Yes the id chip on both fuel Mb (8-pin eeprom in a socket near Ethernet port) and vpro(small 6pin dallas chip) are on I2C bus, not sure what else.